Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Nancy Felder

Specialist in Island Park, NY · enumerated 2025.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1942170014

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Registry record

Entity type Individual (Type 1)

Name Nancy Felder

Sex Female

Practice address 233 Madison Ave, Island Park, NY, 11558

Phone (516) 239-1944

Enumeration date Nov 5, 2025

Last updated in NPPES Nov 5, 2025

Taxonomy & licenses

174400000X Specialist Other Service Providers Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What specialty is Nancy Felder?

Nancy Felder is registered in NPPES with the primary taxonomy of Specialist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-11-05.